System Overview - Polaris 600 RUSH 2010 Manual

Cleanfire Fuel Injection
CLEANFIRE™ FUEL INJECTION

System Overview

System components include:
• ECU: The ECU controls the ignition / fuel injection
angle, chassis/battery relays, and supplies the
MFD gauge with tachometer, water temperature,
PERC, HOT, DET, and diagnostic information.
CAUTION
CFI and DC-CFI ECUs cannot be interchanged. Serious
engine damage may occur.
• Stator: Stator lighting charge coil split into two
independent circuits; one for DC power (Chassis)
and one for AC power (Lighting).
• Flywheel: Flywheel is forged. Fan cover is
removed from flywheel.
• CFI Regulator / Rectifier: Supplies power to the
ECU, fuel pump "boost power", MFD, LED tail
lamp, and accessory DC power points.
• Capacitor: The capacitor suppresses voltage
spikes and ensures consistent voltage throughout
the DC-CFI (RED-RED/WHT) circuits.
• Chassis Relay: The chassis relay on DC-CFI
models supplies power to the MFD gauge,
accessory plug and DC power test plug.
• Ignition Coils: Provide ignition energy to each
spark plug. Both coils are fired at the same time.
• Fuel Injectors (4 Injector): This system features
a set of fuel injectors mounted to the crankcase,
and a set of fuel injectors mounted to the cylinders
(ports).
• Fuel Injectors (2 Injector): This system features
a set of fuel injectors mounted to the cylinders
(ports).
• Detonation Sensor: Located on the cylinder
head, the detonation sensor transforms internal
acoustic information into a signal the ECU uses to
determine the amount of engine knock.
4.6
• Exhaust Valve Solenoid: Activated by the ECU,
the solenoid controls the VES venting. When
powered, the solenoid is open allowing cylinder
pressure to vent, and the exhaust valves remain
closed (down). When power is removed, the
solenoid closes and the exhaust valves will lift.
• Throttle Position Sensor (TPS): The TPS relays
the position of the throttle plates (operator throttle
input) to the ECU.
• Coolant Temperature Sensor: Relays the engine
temperature to the ECU.
• Exhaust Temperature Sensor: Relays the
temperature of the exhaust pipe to the ECU.
• Temperature / Manifold Air Pressure
(T-MAP) Sensor: Relays the current intake air
temperature and ambient air pressure to the ECU.
The sensor is located on the airbox.
• Vehicle Speed Input: The ECU monitors the
vehicle speed supplied by the vehicle speed
sensor.
• Fuel Pump: Supplies fuel to the fuel injectors.
Power to the fuel pump is supplied by the
regulator / rectifier.
• Diagnostic Connector: The ECU can
communicate with the Polaris Digital Wrench®
software and can be re-flashed, monitored and will
display trouble codes.
• AC Regulator/Battery Charge Rectifier: The
head lamps and hand/thumb warmers are
powered by AC voltage. If snowmobile is
equipped with electric start, the regulator/rectifier
supplies DCV to charge the battery.